diff --git a/src/Queries/BaseQuery.php b/src/Queries/BaseQuery.php
index e5dba1e..5165805 100644
--- a/src/Queries/BaseQuery.php
+++ b/src/Queries/BaseQuery.php
@@ -565,4 +565,9 @@ public function __call($method, $parameters)
 
         throw new BadMethodCallException("Call to undefined method {$className}::{$method}()");
     }
+    
+    protected function prepareMultiFilter(&$key, &$value)
+    {
+    
+    }
 }
diff --git a/src/Queries/BaseRelationQuery.php b/src/Queries/BaseRelationQuery.php
index bd498a7..57ec3b0 100644
--- a/src/Queries/BaseRelationQuery.php
+++ b/src/Queries/BaseRelationQuery.php
@@ -115,8 +115,14 @@ protected function filterByModels($models)
         if (preg_match('/^PROPERTY_(.*)_VALUE$/', $primary, $matches) && !empty($matches[1])) {
             $primary = 'PROPERTY_' . $matches[1];
         }
+        $values = array_unique($values, SORT_REGULAR);
+        if (count($values) == 1) {
+            $values = current($values);
+        } else {
+            $this->prepareMultiFilter($primary, $values);
+        }
 
-        $this->filter([$primary => array_unique($values, SORT_REGULAR)]);
+        $this->filter([$primary => $values]);
         $this->select[] = $primary;
     }
 
diff --git a/src/Queries/UserQuery.php b/src/Queries/UserQuery.php
index e3274b0..a453015 100644
--- a/src/Queries/UserQuery.php
+++ b/src/Queries/UserQuery.php
@@ -222,4 +222,9 @@ protected function normalizeUfSelect()
     {
         return preg_grep('/^(UF_+)/', $this->select);
     }
+    
+    protected function prepareMultiFilter(&$key, &$value)
+    {
+        $value = join(' | ', $value);
+    }
 }
diff --git a/tests/RelationTest.php b/tests/RelationTest.php
index 2b4eb33..359617c 100644
--- a/tests/RelationTest.php
+++ b/tests/RelationTest.php
@@ -139,7 +139,7 @@ public function testOne()
 
 
         $bxObject = m::mock('obj');
-        $bxObject->shouldReceive('GetList')->with(m::any(), ['IBLOCK_ID' => TestElement2::IBLOCK_ID, 'PROPERTY_ELEMENT' => [1]], m::any(), ['nPageSize' => 1], m::any())->once()->andReturn(m::self());
+        $bxObject->shouldReceive('GetList')->with(m::any(), ['IBLOCK_ID' => TestElement2::IBLOCK_ID, 'PROPERTY_ELEMENT' => 1], m::any(), ['nPageSize' => 1], m::any())->once()->andReturn(m::self());
         $brandField = [
             'ID' => 1,
             'NAME' => 'Название',
@@ -155,4 +155,4 @@ public function testOne()
         // Проверка, что не выполняются дополнительные запросы
         $product->element;
     }
-}
\ No newline at end of file
+}